我总结的七月换题库后JJ 7/16 - 8/16, 已停止更新

MissNewMe

多谢lsmm~~~~~希望可以有nn来验证一下~~~~~大家都辛苦了~~~~~

这么热的天!!

tangtiantian

Thanks very much!!!!!!!

sandywood

那个HERBCIDES的CR，我在prep里找到了差不多的：

22.        (28162-!-item-!-188;#058&003858)

 

Herbicides allow cereal crops to be grown very efficiently, with virtually no competition from weeds.  In Britain, partridge populations have been steadily decreasing since herbicide use became widespread.  Some environmentalists claim that these birds, which live in and around cereal crop fields, are being poisoned by the herbicides.  However, tests show no more than trace quantities of herbicides in partridges on herbicide-treated land.  Therefore, something other than herbicide use must be responsible for the population decrease.

 

Which of the following, if true about Britain, most seriously weakens the argument?

 

(A) The elimination of certain weeds from cereal crop fields has reduced the population of the small insects that live on those weeds and that form a major part of partridge chicks' diet.

(B) Since partridges are valued as game birds, records of their population are more carefully kept than those for many other birds.

(C) Some of the weeds that are eliminated from cereal crop fields by herbicides are much smaller than the crop plants themselves and would have no negative effect on crop yield if they were allowed to grow.

(D) Birds other than partridges that live in or around cereal crop fields have also been suffering population declines.

(E) The toxins contained in herbicides typically used on cereal crops can be readily identified in the tissues of animals that have ingested them.

icehan

下了下了!

谢谢楼主整理分享!

littleca

谢谢所有辛苦整理JJ的大家！

wangxianan

up

xinyueli_1983

以下是引用luoyangqiulu在2007-7-27 18:31:00的发言：

248.      s和r都是integer, s/r是否为有限小数。1)1/s为有限小数。2）1/r为有限小数。

比原来jj上多integer这个条件,

答案选B

如果s/r是整数（第二个条件很有可能算出来s/r是整数），还选B吗？

如果s/r是整数（第二个条件很有可能算出来s/r是整数），还选B吗？

困惑中！谁来答一下？

困惑中！谁来答一下？

好象以前没有这个多余的条件的时候,选的是E哦

但是,为什么多了一个条件后,就选B了呢??? 请指教!

cognac83

工程好大， RP又好

楼主一定会万福的

tristayang

33.      Integers 2 to 100 inclusive. How many odd integers among them are not divisible ?选项有2,3,4,5,6.

我看了好久。odd Integers包括3, 5, 7, 9, 11......99.而不能被除的包括。抱歉，实在记不起来了。这题好象做错了。请后人补充。

答案:我算出来21个

我列举了一下是25个呢（3，5，7，11，13，17，19，23，29，31，37，41，43，47。53。59。61，67，71，73，79，83，89，91，97

tristayang

310.ＤＳ新题，关于gross profit的。说买了100个什么东西，每个30元买的；以５０元卖了n，又以x元卖了剩下的；说gross profit是１５００，问剩下的卖的平均价钱是否<40还是〉40不记得了？（题目很长，很搞，这个是我的倒数第三题）

１）n＞６０

２）n＜８０

我记得我选的是Ａ．

50n+x(100-n)-30*100=1500=>n=(4500-100x)/(50-x)

条件1=〉(4500-100x)/(50-x)>60 =〉x<37.5

条件2=〉(4500-100x)/(50-x)<80 =〉x>25

 

 

我的想法：n=(4500-100x)/(50-x)

条件一：当50－X＞0时x<37.5

              当50－X＜0时
            x＞50

 

条件二：当50－X＞0时25<x<50

              当50－X＜0时
            x<25

 

所以应该选E